Albert bisbee



(No Model.)

A. BISBEB.

MACHINE FOR MAKING HOLLOW METALLIC BALLS.

No. 338,656. Patented Mar. 23, 1886.

INVENTD'H 2 WITNEEEES'.

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NrTEn STATES PATEN rrrca.

ALBERT BISBEE, OF PLAINVILLE, MASSACHUSETTS, ASSIGNOR TO LINCOLN, BACON& 00. AND BISBEE, SXVIFT & BURROWVS.

MACHINE FOR MAKING HOLLOW METALLiC BALLS.

EPECIFICATZON forming part Of Letters Patent No. 338,656,6lat8f1 March23, 1886.

Application filed June 20, 1884.

To all whom, it may concern:

Be it known that I, ALBERT BIsBEE, of Plainville, in the county ofNorfolk, in the State of Massachusetts, have invented a new and usefulImprovement in Machines for Manufacturing Hollow Metal Balls or Beads,of which the following is a specification.

The nature of my invention consists in the combination of oppositecircularly-grooved rotating rollers and intervening guidesforhemispherically closing the open end of a tube or cup to form ahollow ball or bead, and means for feeding tubular or cup-formed blanksto the said rollers, as hereinafter fully set forth.

Figure l is a plan view of my improved machine. Fig. 2 is a sideelevation of the rollingtool adapted toimpart a hemispherical form tothe hollow blanks. Fig. 3 is a side elevation of the rolling-tool, takenat right angles to the view shown in Fig. 2. Fig. 4 is a detail sectionshowing the combination of the rollingtool with the holding-tool. Fig. 5represents a plan view of an original metal blank cut out to form ahollow bead or ball. Fig. 6 represents a side elevation of a cylindricalcup formed from the blank shown in Fig. 5. Fig. 7 shows the result ofthe action of the rollingtool upon the open end of the cup shown in Fig.6. Fig. 8 is a plan view of the intervening side guides of therolling-tool.

In the accompanying drawings, A is the bed of the machine, B thehead-block, and O the tail-block, which is adj ustably held within thegroove a of the bed by means of a tightemng-screw.

\Vithin the bore of the tail-block is loosely fitted the spindle D,adapted to receive the shank I) of the holding-tool E. In the centralbore, 0, of the holding-tool E is arranged the sliding forcer F, whichis hollowed out at its forward end to fit the hemispherical base a ofthe cup N, and at its rear end is jointed to the hand-lever G, which isconnected by means of the pivoted link f to the rear of the tail-block.

At the forward end of the rotating shaft H of the head-block B issecured the rolling-tool I, having a tapering center shank, 9, adaptedfor ready insertion or removal from the center bore of the shaft H. Theshank g is provided at its outer end with the opposite arms h h, whichare centrally perforated to receive the Serial No. 135,548. (No model.)

transverse bearing-pin t, upon which, in the space between the arms h h,are loosely placed the circumferentially-groovcd opposite rollers J J,the cross-section of the groove in each roller forming a quadrant, sothat when the two rollers are arranged upon the bearing-pin 13 thecross-section of the combined grooves of the rollers will form asemicircle.

K is a guide-piece, also secured to the forso ward end of the shank andterminating in the two opposite jaws jj, which are held in thehemispherical groove formed between the rollers J J.

The holding-tool E is cut away at the point as usual in such devices,and is provided at its forward end with a handle, 25, by means of whichthe spindle D may be moved back and forth within the bore of thetail-block.

In operating the machine to form a hollow ball a sheet-metal blank, M,is to be first formed 7 5 by suitable dies into a cup, N, having aclosed hemispherical end, a, as shown in Fig. 6. A rapid rotary movementbeing imparted to the shaft H, which carries the rolling-tool I, and

the tail-block so set as to bring the holding-tool E in proper proximityto the rolling-tool, the lever G is to be thrown back, as shown in Fig.1, thus carrying the hollowed face of the forcer F back of thercceivingnotch it, into which the cup N is to be inserted, thehemispherical base of the cup being made to rest in the concavity of theend of the forcer.

The bore 0 of the holder E, at its forward end, is made slightly smallerthan the outside diameter of the cup N, so that upon moving o the leverGr forward the initial movement of the forcer will, by the frictionalresistance of the cup N, be imparted to the spindle I) until the face ofthe holding-tool is brought against the edges of the rollers J J, or inclose proxim- 5 ity thereto, as shown in Fig. 4, being in the lattercase held from farther forward movement by means of a suitably-arrangedstop. The continued forward movement of the forcer will then serve toforce the cup N forward ICO along the bore 0 of the holder and into thechamber formed by the grooved edges of the rollers J J and theintervening guides j j, the

rapid rotation of the rollers serving to compress the open end of thecup, and to close the stock inward, as shown in Fig. 7, leaving a smallopening, 1", which, if desired, may be further closed by the finishingoperation usually employed in the manufacture of such articles.

The cup N,will be securely held,when under the operation of rolling,bythe friction between the sides and bottom of the cup and the contractedbore of the holding-tool and the hollowed face of the forcer. Uponmoving back the lever G the forcer F will be withdrawn from the base ofthe closed ball or bead, and then the holding-tool E may be withdrawnfrom the rolling-tool I by means of the handle 2, which projects fromthe forward end of the sliding spindle D. The closed ball or bead P,being still frictionally held in the bore of the holding-tool, will bythe said backward movement of the holding-tool be withdrawn from betweenthe rollers J J and guides j j, and then,in order to remove the ball orbead from the bore of the holding-tool, the spindle D is to be firmlyheld in its backward position while a forward movement is being impartedto the forcer F, which will cause the ball or bead to drop from the boreof the holding-tool, after which another cup-blank may be placed.

in the opening k, to be operated upon as before.

In the manufacture ofbeads a hole corresponding to the hole 1" may bemade in the blank M, or in the bottom of the cup N, previous toinsertion into the bore of the holdingtool.

I claim as my invention-- 1. In a machine for making hollow balls orheads, the combination of the revolving grooved rollers with theintervening guides, and means for forcing the hollowformed blanks intothe chamber between the said revolving rollers and guides, substantiallyas described.

2. The'combination of the revolving grooved rollers and the interveningguides, the hollow holder, and the sliding forcer, substantially asdescribed.

3. The combination of the head-block, the revolving grooved rollers, andintervening guides,with the tail-block, the sliding spindle, the holderprovided with the inlet-opening, and the sliding forcer, substantiallyas described.

ALBERT BISBEE.

\Vitn esses:

SOGRATES SoHoLFrELn, RICHARD A. BRIGHT.

